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Re: [Qemu-block] [PATCH v2 for-4.1 2/2] iotests: Test backup job with tw

From: Vladimir Sementsov-Ogievskiy
Subject: Re: [Qemu-block] [PATCH v2 for-4.1 2/2] iotests: Test backup job with two guest writes
Date: Thu, 1 Aug 2019 18:02:00 +0000

01.08.2019 20:39, Max Reitz wrote:
> Perform two guest writes to not yet backed up areas of an image, where
> the former touches an inner area of the latter.
> Before HEAD^, copy offloading broke this in two ways:
> (1) The target image differs from the reference image (what the source
>      was when the backup started).
> (2) But you will not see that in the failing output, because the job
>      offset is reported as being greater than the job length.  This is
>      because one cluster is copied twice, and thus accounted for twice,
>      but of course the job length does not increase.
> Signed-off-by: Max Reitz <address@hidden>

Reviewed-by: Vladimir Sementsov-Ogievskiy <address@hidden>
Tested-by: Vladimir Sementsov-Ogievskiy <address@hidden>

Best regards,

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